TAILIEUCHUNG - A new fluid structure interaction solver in OpenFOAM

In this article, we introduce a new numerical solver for the Fluid-Structure Interaction problem. The solver is developed using Immersed Boundary Method (IBM) integrated into OpenFOAM environment. The velocitypressure coupling is implemented via modifying the PISO algorithm of OpenFOAM. | Journal of Science Technology 135 2019 023-027 A New Fluid-Structure Interaction Solver in OpenFOAM Do Quoc Vu Pham Van Sang Hanoi University of Science and Technology - No. 1 Dai Co Viet Str. Hai Ba Trung Ha Noi Vietnam Received May 28 2018 Accepted June 24 2019 Abstract In this article we introduce a new numerical solver for the Fluid-Structure Interaction problem. The solver is developed using Immersed Boundary Method IBM integrated into OpenFOAM environment. The velocitypressure coupling is implemented via modifying the PISO algorithm of OpenFOAM. The solver can solve for the interaction of multiple structures in fluid flow. The collision of structures is simulated using an elastic repulsive force model. A parallel algorithm is developed to make the solver able to run on parallel computer system structures can move from a partition to another partition. The solver was validated and applied in solving the real problem. Keywords Immersed boundary method Fluid-Structure interaction IBMFoam particulated flow 1. Introduction Over the last few decades the fluid-structure interaction FSI has gained increasing attention in numerical simulation because understanding the relationship between structures and fluid flows is crucial in many real-life applications. Recently Microfluidics which refers to different kind of microscale devices used for separating particles can also be simulated using FSI technique. However current commercial simulation software is not able to effectively handle problems involving moving objects with large trajectories . the particles in microfluidic devices. The requirement of massive and complex computational mesh to capture the extremely long pathway of moving objects makes such problems very challenging to be solved. In this work we aim to develop a robust solver that can effectively solve for FSI problems. The new solver named IBMFoam has been implemented in the OpenFOAM open source environment based on the available solver pisoFOAM using

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